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Subject[PATCH 2/3] ASoC: es8316: Add clock control of MCLK
Date
This patch introduce clock property for MCLK master freq control.
Driver will set rate of MCLK master if set_sysclk is called and
changing sysclk by board driver.

Signed-off-by: Katsuhiro Suzuki <katsuhiro@katsuster.net>
---
sound/soc/codecs/es8316.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/sound/soc/codecs/es8316.c b/sound/soc/codecs/es8316.c
index 229808fa627c..9ed564eac202 100644
--- a/sound/soc/codecs/es8316.c
+++ b/sound/soc/codecs/es8316.c
@@ -9,6 +9,7 @@

#include <linux/module.h>
#include <linux/acpi.h>
+#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
@@ -33,6 +34,7 @@ static const unsigned int supported_mclk_lrck_ratios[] = {

struct es8316_priv {
struct mutex lock;
+ struct clk *mclk;
struct regmap *regmap;
struct snd_soc_component *component;
struct snd_soc_jack *jack;
@@ -363,12 +365,19 @@ static int es8316_set_dai_sysclk(struct snd_soc_dai *codec_dai,
{
struct snd_soc_component *component = codec_dai->component;
struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component);
+ int ret;

es8316->sysclk = freq;

if (freq == 0)
return 0;

+ if (es8316->mclk) {
+ ret = clk_set_rate(es8316->mclk, freq);
+ if (ret)
+ return ret;
+ }
+
return 0;
}

@@ -693,9 +702,20 @@ static int es8316_set_jack(struct snd_soc_component *component,
static int es8316_probe(struct snd_soc_component *component)
{
struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component);
+ int ret;

es8316->component = component;

+ es8316->mclk = devm_clk_get(component->dev, "mclk");
+ if (PTR_ERR(es8316->mclk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ if (es8316->mclk) {
+ ret = clk_prepare_enable(es8316->mclk);
+ if (ret)
+ return ret;
+ }
+
/* Reset codec and enable current state machine */
snd_soc_component_write(component, ES8316_RESET, 0x3f);
usleep_range(5000, 5500);
--
2.23.0.rc1
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